Nature of heterointerfaces in GaAs/InAs and InAs/GaAs axial nanowire heterostructures

Paladugu, Mohanchand; Jin Zou; Guo, Ya-Nan; Xin Zhang; Yong Kim; Joyce, Hannah J.; Qiang Gao; Tan, H. Hoe; Jagadish, C.
September 2008
Applied Physics Letters;9/8/2008, Vol. 93 Issue 10, p101911
Academic Journal
The structural and compositional characteristics of heterointerfaces of Au-catalyzed GaAs/InAs and InAs/GaAs axial nanowire heterostructures were comprehensively investigated by transmission electron microscopy. It has been found that the GaAs/InAs interface is not sharp and contains an InGaAs transition segment, and in contrast, the InAs/GaAs interface is atomically sharp. This difference in the nature of heterointerfaces can be attributed to the difference in the affinity of the group III elements with the catalyst material.


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